Doom Speed Demo Archive
https://dsdarchive.com/

Iwad:      DOOM2.WAD
Pwad:      CRATE_ESCAPE.wad
Map:       MAP14
Skill:     5
Category:  NM Speed
Exe:       dsda-doom 0.29.4 -complevel 2

Time:      1:14.06

Author:    Keykhosrau

Advanced HUD used
Video: https://youtu.be/0n3EkKdX1DA


Comments:  At first I thought it was impossible do Nightmare! because of the Chaingunners attacking you right away. Apparently being stuck in a wall of taffy did not bother them too much.
But using the route from NoMo made it so you don't have to worry about them nearly as much. Furthermore, not shooting your weapons means that a significant amount of monsters won't bother you while you hunt for keys.
There is enough health aswell (even a partial invuln!) that neutralises the threat of the hitscanners substantially.
A full table sweep for this map, it seems!